/*
 * Copyright (c) 2025, 2025, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
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 */
package com.oracle.svm.util;

import java.util.IllformedLocaleException;
import java.util.Locale;

public class LocaleUtil {

    /**
     * @return locale for given tag or null for invalid ones
     */
    @SuppressWarnings("deprecation")
    public static Locale parseLocaleFromTag(String tag) {
        try {
            return new Locale.Builder().setLanguageTag(tag).build();
        } catch (IllformedLocaleException ex) {
            /*- Custom made locales consisting of at most three parts separated by '-' are also supported */
            String[] parts = tag.split("-");
            switch (parts.length) {
                case 1:
                    return new Locale(parts[0]);
                case 2:
                    return new Locale(parts[0], parts[1]);
                case 3:
                    return new Locale(parts[0], parts[1], parts[2]);
                default:
                    return null;
            }
        }
    }
}
